This is not speculation;

这不是推测；

youdao

It will reward production and not speculation.

它将回报生产，而不是投机。

youdao

This is not speculation; this is high school science.

这不是臆想，而是高中科学知识了。

youdao

"This is not a mere suspicion or speculation, some concrete indications of this possibly have been received."

VOA: standard.2009.09.25

In truth it is not speculation but indecision and timidity that are at fault.

ECONOMIST: Germany continues to dither over how best to rescue the euro

And as I said, this is not speculation.

WHITEHOUSE: President Obama on Early Childhood Education

So your premiums have doubled, the average family's premiums have doubled over the last 10 years, and it is a certainty -- this is not speculation, it is a certainty that if we do nothing your premiums will double again over the next 10 years.

WHITEHOUSE: President Obama Holds Town Hall in New Orleans